A firewall is a network security device that monitors incoming and outgoing network traffic and blocks or permits data packets based on security rules. It analyzes traffic according to pre-configured rules, filtering traffic from suspicious sources and only allowing reliable traffic through. There are host-based firewalls that protect individual devices and network-based firewalls that protect entire networks. Firewall rules can specify IP addresses, domain names, protocols, programs, and ports.

1. Network
Cloud
Security
Firewall Concept

2. What is a Firewall?
A firewall is a network
security device that
monitors incoming and
outgoing network traffic
and permits or blocks
data packets based on a
set of security rules.

3. How Firewall Works?
A firewall analyses
the traffic hitting the
network based on
pre-configured rules
on firewall and filters
the traffic based on
pre-defined rules
and prohibits traffic
generating from
unreliable and
suspicious sources.

4. Types of Firewall
1.Host Based Firewall
Its Protect only the
particular host or PC
2. Network Based Firewall
Its protect entire network

5. Firewall Rules
• IP Address
• Domain Name
• Protocol
• Programs
• Ports

6. Firewall Activities

7. Firewall in a Network Diagram

8. Firewall Brands

9. Thank You
Nihan & Amjath